Skip to main content
Journal cover image

Does femoral component loosening predispose to femoral fracture?: an in vitro comparison of cemented hips.

Publication ,  Conference
Harris, B; Owen, JR; Wayne, JS; Jiranek, WA
Published in: Clin Orthop Relat Res
February 2010

The incidence of femur fracture around total hip arthroplasties continues to increase at substantial cost to society. These fractures are frequently associated with a loose femoral component. Consequently, we sought to test whether femoral component loosening predisposes to periprosthetic femoral fracture. Because many periprosthetic femoral fractures are spiral in nature, we evaluated the torsional characteristics of the implanted femur in which the only design variable was instability of the femoral component. We used synthetic (polyurethane) (n = 15) and paired cadaveric femora (n = 10) with specimens divided into two groups: well-fixed and loose cemented stems. Each specimen was tested mechanically in internal rotation until failure. For the synthetic specimens, torque to failure was reduced by 38%, whereas stiffness was decreased 54% for the loose group compared with the well-fixed group. For the cadaveric specimens, torque to failure was reduced by 58%, whereas stiffness decreased 70% for the loose group compared with the well-fixed group. Fracture patterns were similar between synthetic and cadaveric femora with a proximal spiral pattern in loose specimens and more distal fracture patterns with well-fixed stems. Based on our data, patients with loosened femoral components are at risk for fracture at a substantially lower torque than those with well-fixed components.

Duke Scholars

Published In

Clin Orthop Relat Res

DOI

EISSN

1528-1132

Publication Date

February 2010

Volume

468

Issue

2

Start / End Page

497 / 503

Location

United States

Related Subject Headings

  • Torsion, Mechanical
  • Rotation
  • Risk Assessment
  • Prosthesis Failure
  • Prosthesis Design
  • Polyurethanes
  • Periprosthetic Fractures
  • Orthopedics
  • Middle Aged
  • Joint Instability
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Harris, B., Owen, J. R., Wayne, J. S., & Jiranek, W. A. (2010). Does femoral component loosening predispose to femoral fracture?: an in vitro comparison of cemented hips. In Clin Orthop Relat Res (Vol. 468, pp. 497–503). United States. https://doi.org/10.1007/s11999-009-1034-0
Harris, Barton, John R. Owen, Jennifer S. Wayne, and William A. Jiranek. “Does femoral component loosening predispose to femoral fracture?: an in vitro comparison of cemented hips.” In Clin Orthop Relat Res, 468:497–503, 2010. https://doi.org/10.1007/s11999-009-1034-0.
Harris B, Owen JR, Wayne JS, Jiranek WA. Does femoral component loosening predispose to femoral fracture?: an in vitro comparison of cemented hips. In: Clin Orthop Relat Res. 2010. p. 497–503.
Harris, Barton, et al. “Does femoral component loosening predispose to femoral fracture?: an in vitro comparison of cemented hips.Clin Orthop Relat Res, vol. 468, no. 2, 2010, pp. 497–503. Pubmed, doi:10.1007/s11999-009-1034-0.
Harris B, Owen JR, Wayne JS, Jiranek WA. Does femoral component loosening predispose to femoral fracture?: an in vitro comparison of cemented hips. Clin Orthop Relat Res. 2010. p. 497–503.
Journal cover image

Published In

Clin Orthop Relat Res

DOI

EISSN

1528-1132

Publication Date

February 2010

Volume

468

Issue

2

Start / End Page

497 / 503

Location

United States

Related Subject Headings

  • Torsion, Mechanical
  • Rotation
  • Risk Assessment
  • Prosthesis Failure
  • Prosthesis Design
  • Polyurethanes
  • Periprosthetic Fractures
  • Orthopedics
  • Middle Aged
  • Joint Instability